As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLIGHT CREW AND CABIN CREW DETECTED AN ACRID ODOR ON CLIMBOUT, CRUISE AND DESCENT. MAINTENANCE FOUND APU SCAVENGE FILTER HOUSING LEAKING. REMOVED AND REPLACED O-RING PER AMM 49-91-52. LEAK CHECK OK. ACCOMPLISHED JOB CARDS 26L00021001 - T/S CABIN AIR QUALITY, 26L00021001 - APU SMELL IN CABIN, 26L31049009 - CLEAN APU LOAD COMPRESSOR AND 26L00021004 - DECONTAMINATION OF ESC A319/A320/A321 ENGINES AND APU.